Hand gesture verification | Google Cloud Fraud Defense | Google Cloud Documentation

Skip to main content

Console

English

Deutsch

Español – América Latina

Français

Indonesia

Italiano

Português – Brasil

中文 – 简体

中文 – 繁體

日本語

한국어

Sign in

Google Cloud Fraud Defense

Start free

reCAPTCHA is a part of Google Cloud Fraud Defense. For more information, see Google Cloud Fraud Defense.

Home

Documentation

Security

Google Cloud Fraud Defense

Guides

Send feedback

Hand gesture verification

Stay organized with collections

Save and categorize content based on your preferences.

This document provides information about data collection, camera permissions,<br>and accessibility for hand gesture verification.

Data collection and storage

When the hand gesture feature is enabled, reCAPTCHA collects the following data:

Google analyzes one or more videos of a user's hand as they perform various<br>actions or gestures. The video is processed to extract hand landmark data,<br>which includes<br>21 hand-knuckle coordinates.

The videos are never associated with a user's identity and are deleted after<br>the verification process. Audio is never recorded.

Additional data storage

Google does not retain any images or videos of a user's hand gestures beyond<br>the verification process or use the data for any other purpose. Videos or<br>images are automatically deleted after the challenge is complete.

The information Google collects is used and stored in accordance with the<br>Google Privacy Policy.

Permissions

Hand gesture challenges require permission to access a user's camera. After the<br>user consents to perform hand gestures, Google receives camera permissions, and<br>users can manage these permissions in their browser settings at any time. Google<br>processes hand gesture videos for the sole purpose of security verification and<br>does not transfer any related data or permissions to third parties.

Accessibility

For users with accessibility needs who cannot use hand gestures to complete the<br>challenge, reCAPTCHA continues to provide visual and audio<br>challenges, and develop more accessible and secure alternatives.

Send feedback

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2026-06-11 UTC.

Need to tell us more?

[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2026-06-11 UTC."],[],[]]